#9944: categories for polynomial rings
----------------------------------------------+-----------------------------
Reporter: robertwb | Owner: nthiery
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.7
Component: categories | Keywords:
Author: Robert Bradshaw | Upstream: N/A
Reviewer: Nicolas M. Thiéry, Mike Hansen | Merged:
Work_issues: |
----------------------------------------------+-----------------------------
Changes (by SimonKing):
* status: needs_work => needs_info
* work_issues: Fix one test =>
Comment:
FWIW: The doc tests pass.
Here is another idea what the slow down may come from. It was pointed out
by Nicolas that the mro from the polynomial ring to `Parent` does not
become longer by initialising the category properly: The inheritance from
category parent classes comes ''after'' Python inheritance. However, when
all the parent classes of all super categories must be searched, it takes
considerably longer before an `AttributeError` can be raised.
A similar issue has been studied at #10467. It seems to be important that
an attribute error is raised as quickly as possible. That becomes
difficult, if 60 parent classes need to be searched, before one eventually
finds that the requested attribute does not exist.
But probably that question is out of the scope of this ticket.
So, what shall one do? Give it a positive review and accept the
deceleration, or wait until someone has a model for improved attribute
access?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9944#comment:17>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
